Bump sphinx from 7.3.7 to 7.4.7 in /docs

Bumps [sphinx](https://github.com/sphinx-doc/sphinx) from 7.3.7 to 7.4.7.
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v7.3.7...v7.4.7)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

docs/requirements.txt

@@ -6,15 +6,15 @@
 #
 alabaster==0.7.16
     # via sphinx
-babel==2.12.1
+babel==2.15.0
     # via sphinx
 certifi==2023.7.22
     # via requests
 charset-normalizer==3.2.0
     # via requests
 defusedxml==0.7.1
     # via sphinxcontrib-datatemplates
-docutils==0.18.1
+docutils==0.20.1
     # via
     #   myst-parser
     #   sphinx
@@ -45,7 +45,7 @@ openpyxl==3.1.3
     # via -r requirements.in
 packaging==23.1
     # via sphinx
-pygments==2.16.1
+pygments==2.18.0
     # via sphinx
 pyyaml==6.0.1
     # via
@@ -55,7 +55,7 @@ requests==2.31.0
     # via sphinx
 snowballstemmer==2.2.0
     # via sphinx
-sphinx==7.3.7
+sphinx==7.4.7
     # via
     #   -r requirements.in
     #   myst-parser